370 lines
12 KiB
Markdown
370 lines
12 KiB
Markdown
# MCP Core Tools Contract
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Date: 2026-07-09
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## Route statement
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项目核心不是继续做 UIA selector/report，而是通过 MCP 暴露 iSphere 的联系人、群组、消息、文件能力。
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This contract defines the business-facing MCP tool surface. The existing `win_helper_*` tools remain low-level auxiliary tools for controlled read-only observation and fallback implementation work. They are not the product API.
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## Hard boundaries
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- No automatic login.
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- No permission bypass.
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- No process injection, hook, target-process memory read, credential extraction, or endpoint-security bypass.
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- Search contacts, search groups, receive messages, and receive files should be implemented read-only first.
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- Real message sending and file sending require `approval_id`.
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- Without `approval_id`, write-capable tools must stay in `dry_run=true` behavior and must not send.
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- Every real write must produce an audit record with target, content/file hash, approver, timestamp, source connector, and result.
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- UIA selectors are allowed only as fallback access mechanics after higher-priority sources are exhausted or unavailable.
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## Common error codes
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| Code | Meaning |
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| --- | --- |
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| `INVALID_ARGUMENT` | Required parameter missing or invalid. |
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| `SOURCE_UNAVAILABLE` | Selected bridge/API/database/UIA source is unavailable. |
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| `NOT_LOGGED_IN` | A required manually logged-in client session is not present. |
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| `PERMISSION_DENIED` | Current operator/account is not authorized for the requested object. |
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| `APPROVAL_REQUIRED` | A real write was requested without valid approval. |
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| `DRY_RUN_ONLY` | Tool is currently limited to dry-run behavior. |
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| `TARGET_NOT_FOUND` | Contact, group, conversation, message, or file was not found. |
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| `AMBIGUOUS_TARGET` | Multiple possible targets match and the request must be narrowed. |
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| `TIMEOUT` | The connector did not complete before timeout. |
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| `CONNECTOR_FAILED` | Underlying source or helper returned a structured failure. |
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| `INTERNAL_ERROR` | Unexpected implementation error. |
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## Common audit fields
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Every tool response should include an `audit` object:
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```json
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{
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"tool": "isphere_search_contacts",
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"request_id": "uuid",
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"source": "bridge|local_readonly|uia|network|mock",
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"operator_id": "optional operator identity",
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"approval_id": null,
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"dry_run": false,
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"target_ref": "optional stable target reference",
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"content_sha256": null,
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"file_sha256": null,
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"started_at": "ISO-8601",
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"finished_at": "ISO-8601",
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"result": "ok|error"
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}
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```
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## Tool: `isphere_search_contacts`
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| Field | Value |
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| --- | --- |
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| Business purpose | Search authorized iSphere contacts so a digital employee can resolve a person before reading or drafting work. |
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| Read-only | Yes. |
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| Requires `approval_id` | No. |
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| Supports `dry_run` | Not required; optional `dry_run` may return the planned query only. |
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| Current priority | Stage C read-only loop, first priority. |
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Input parameters:
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```json
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{
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"query": "string, required",
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"limit": "integer, optional, default 20, max 100",
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"cursor": "string, optional",
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"source_preference": "bridge|local_readonly|uia|network|auto, optional, default auto",
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"include_inactive": "boolean, optional, default false"
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}
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```
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Output JSON:
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```json
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{
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"ok": true,
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"contacts": [
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{
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"contact_id": "string",
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"display_name": "string",
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"account": "string|null",
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"department": "string|null",
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"title": "string|null",
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"source": "bridge|local_readonly|uia|network|mock",
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"confidence": 0.98,
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"raw_ref": "redacted source reference"
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}
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],
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"next_cursor": null,
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"audit": {}
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}
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```
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Errors: `INVALID_ARGUMENT`, `SOURCE_UNAVAILABLE`, `NOT_LOGGED_IN`, `PERMISSION_DENIED`, `TIMEOUT`, `CONNECTOR_FAILED`, `INTERNAL_ERROR`.
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## Tool: `isphere_search_groups`
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| Field | Value |
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| --- | --- |
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| Business purpose | Search authorized iSphere groups so a digital employee can resolve a group conversation before reading or drafting work. |
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| Read-only | Yes. |
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| Requires `approval_id` | No. |
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| Supports `dry_run` | Not required; optional `dry_run` may return the planned query only. |
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| Current priority | Stage C read-only loop, first priority. |
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Input parameters:
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```json
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{
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"query": "string, required",
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"limit": "integer, optional, default 20, max 100",
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"cursor": "string, optional",
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"source_preference": "bridge|local_readonly|uia|network|auto, optional, default auto",
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"include_archived": "boolean, optional, default false"
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}
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```
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Output JSON:
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```json
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{
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"ok": true,
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"groups": [
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{
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"group_id": "string",
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"display_name": "string",
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"member_count": "integer|null",
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"owner_ref": "string|null",
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"source": "bridge|local_readonly|uia|network|mock",
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"confidence": 0.96,
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"raw_ref": "redacted source reference"
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}
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],
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"next_cursor": null,
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"audit": {}
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}
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```
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Errors: `INVALID_ARGUMENT`, `SOURCE_UNAVAILABLE`, `NOT_LOGGED_IN`, `PERMISSION_DENIED`, `TIMEOUT`, `CONNECTOR_FAILED`, `INTERNAL_ERROR`.
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## Tool: `isphere_receive_messages`
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| Field | Value |
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| --- | --- |
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| Business purpose | Read authorized recent messages and normalize them for digital employee reasoning and drafting. |
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| Read-only | Yes. |
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| Requires `approval_id` | No. |
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| Supports `dry_run` | Optional; if true, returns source/query plan without message bodies. |
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| Current priority | Stage C read-only loop, first priority after contact/group source discovery. |
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Input parameters:
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```json
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{
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"conversation_id": "string, optional when query is supplied",
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"conversation_type": "direct|group|system|unknown, optional",
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"query": "string, optional target name or keyword",
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"since": "ISO-8601 timestamp, optional",
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"limit": "integer, optional, default 50, max 200",
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"cursor": "string, optional",
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"include_attachment_metadata": "boolean, optional, default true",
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"source_preference": "bridge|local_readonly|uia|network|auto, optional, default auto",
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"dry_run": "boolean, optional, default false"
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}
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```
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Output JSON:
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```json
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{
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"ok": true,
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"conversation": {
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"conversation_id": "string",
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"conversation_type": "direct|group|system",
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"display_name": "string"
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},
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"messages": [
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{
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"message_id": "string",
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"sender_id": "string|null",
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"sender_name": "string|null",
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"content_type": "text|image|file|rich|notify|unknown",
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"content_text": "authorized text or redacted summary",
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"attachments": [
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{
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"file_id": "string",
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"file_name": "string",
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"size_bytes": "integer|null",
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"download_ref": "string|null"
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}
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],
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"created_at": "ISO-8601|null",
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"received_at": "ISO-8601|null",
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"source": "bridge|local_readonly|uia|network|mock",
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"raw_ref": "redacted source reference"
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}
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],
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"next_cursor": null,
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"audit": {}
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}
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```
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Errors: `INVALID_ARGUMENT`, `SOURCE_UNAVAILABLE`, `NOT_LOGGED_IN`, `PERMISSION_DENIED`, `TARGET_NOT_FOUND`, `TIMEOUT`, `CONNECTOR_FAILED`, `INTERNAL_ERROR`.
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## Tool: `isphere_receive_files`
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| Field | Value |
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| --- | --- |
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| Business purpose | List and receive/download authorized files from messages without mutating the iSphere client state. |
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| Read-only | Yes for source/client state. It may write downloaded files only to an operator-approved local output directory. |
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| Requires `approval_id` | No for read-only listing or authorized download. Approval can be added later for sensitive destinations. |
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| Supports `dry_run` | Yes. `dry_run=true` lists planned files and destination paths without downloading. |
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| Current priority | Stage C read-only loop after messages expose file metadata. |
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Implementation note: if the implementation becomes clearer with two internal operations, split into `list_files` and `download_file` behind this business contract. Do not expand the roadmap beyond receive/download.
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Input parameters:
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```json
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{
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"conversation_id": "string, optional",
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"message_id": "string, optional",
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"file_id": "string, optional for download, omitted for list",
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"mode": "list|download, optional, default list",
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"output_dir": "string, optional, required for download",
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"limit": "integer, optional, default 50, max 200",
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"cursor": "string, optional",
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"source_preference": "bridge|local_readonly|uia|network|auto, optional, default auto",
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"dry_run": "boolean, optional, default true for download"
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}
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```
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Output JSON:
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```json
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{
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"ok": true,
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"mode": "list|download",
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"files": [
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{
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"file_id": "string",
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"message_id": "string|null",
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"conversation_id": "string|null",
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"file_name": "string",
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"size_bytes": "integer|null",
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"mime_type": "string|null",
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"created_at": "ISO-8601|null",
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"download_ref": "string|null",
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"saved_path": "string|null",
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"sha256": "string|null",
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"source": "bridge|local_readonly|uia|network|mock"
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}
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],
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"next_cursor": null,
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"audit": {}
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}
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```
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Errors: `INVALID_ARGUMENT`, `SOURCE_UNAVAILABLE`, `NOT_LOGGED_IN`, `PERMISSION_DENIED`, `TARGET_NOT_FOUND`, `DRY_RUN_ONLY`, `TIMEOUT`, `CONNECTOR_FAILED`, `INTERNAL_ERROR`.
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## Tool: `isphere_send_message`
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| Field | Value |
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| --- | --- |
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| Business purpose | Send an approved text message to a resolved contact or group. |
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| Read-only | No. |
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| Requires `approval_id` | Yes for any real send. |
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| Supports `dry_run` | Yes, required. Default must be `true` until production approval flow is accepted. |
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| Current priority | Stage D approval-after-read-only loop. |
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Input parameters:
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```json
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{
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"target_type": "contact|group|conversation, required",
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"target_id": "string, required",
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"content_text": "string, required",
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"approval_id": "string, required when dry_run=false",
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"dry_run": "boolean, optional, default true",
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"idempotency_key": "string, optional but recommended",
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"source_preference": "bridge|uia|network|auto, optional, default auto"
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}
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```
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Output JSON:
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```json
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{
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"ok": true,
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"dry_run": true,
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"send_status": "planned|sent|rejected",
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"target": {
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"target_type": "contact|group|conversation",
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"target_id": "string",
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"display_name": "string|null"
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},
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"message_ref": null,
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"content_sha256": "sha256 hex",
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"audit": {}
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}
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```
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Errors: `INVALID_ARGUMENT`, `APPROVAL_REQUIRED`, `PERMISSION_DENIED`, `NOT_LOGGED_IN`, `TARGET_NOT_FOUND`, `AMBIGUOUS_TARGET`, `DRY_RUN_ONLY`, `TIMEOUT`, `CONNECTOR_FAILED`, `INTERNAL_ERROR`.
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## Tool: `isphere_send_file`
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| Field | Value |
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| --- | --- |
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| Business purpose | Send an approved local file to a resolved contact or group. |
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| Read-only | No. |
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| Requires `approval_id` | Yes for any real send. |
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| Supports `dry_run` | Yes, required. Default must be `true` until production approval flow is accepted. |
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| Current priority | Stage D after `isphere_send_message`. |
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Input parameters:
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```json
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{
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"target_type": "contact|group|conversation, required",
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"target_id": "string, required",
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"file_path": "string, required; must be under an approved outbound directory",
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"caption": "string, optional",
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"approval_id": "string, required when dry_run=false",
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"dry_run": "boolean, optional, default true",
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"idempotency_key": "string, optional but recommended",
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"source_preference": "bridge|uia|network|auto, optional, default auto"
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}
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```
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Output JSON:
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```json
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{
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"ok": true,
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"dry_run": true,
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"send_status": "planned|sent|rejected",
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"target": {
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"target_type": "contact|group|conversation",
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"target_id": "string",
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"display_name": "string|null"
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},
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"file_ref": null,
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"file_sha256": "sha256 hex",
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"file_size_bytes": 12345,
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"audit": {}
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}
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```
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Errors: `INVALID_ARGUMENT`, `APPROVAL_REQUIRED`, `PERMISSION_DENIED`, `NOT_LOGGED_IN`, `TARGET_NOT_FOUND`, `AMBIGUOUS_TARGET`, `DRY_RUN_ONLY`, `TIMEOUT`, `CONNECTOR_FAILED`, `INTERNAL_ERROR`.
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## Stage priority summary
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| Priority | Tool | Stage |
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| --- | --- | --- |
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| 1 | `isphere_search_contacts` | C read-only loop |
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| 2 | `isphere_search_groups` | C read-only loop |
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| 3 | `isphere_receive_messages` | C read-only loop |
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| 4 | `isphere_receive_files` | C read-only loop |
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| 5 | `isphere_send_message` | D approval-backed write |
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| 6 | `isphere_send_file` | D approval-backed write |
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